Cotton pulp black liquor is an industrial organic wastewater which is difficult to deal with.The primary contributor to the color and toxicity of black liquor is the high-molecular-weight lignin.Lignin is not only the main pollutant of chemical fiber indus-tries,but also the by-products of the pulp and paper industries.Because of underutilized in the past,lignin has become one of the major contaminants in the environment.So a high efficiency and low cost approach is urgently required to solve this problem.W...